Not trying to give false hope (this is my first incubation ever), but for several days I couldn't see my little duckie moving in the egg. I was getting worried. I could see distinct vibrant veins though so I was puzzled (everything I read said they'd disappear if they're no longer alive in the egg). I candled 2 nights ago and to my surprise I saw his/her little beak just moving and moving, and the shading in the egg had grown. Candled quickly tonight and he/she is even bigger, the air sac grew (appropriately), and the veining looks great (nice, vibrant, and very distinct). He/she is in the perfect position for hatch, hoping it will happen soon. Maybe you're catching when they're resting? Check and see if you see any clear, healthy, and distinct blood veining. I have been shining my led flashlight in from air sac side and angling a little as needed.